The special preview for members of law-enforcement in Boston has not yet been scheduled. The announcement about it was made three days after two bombs were set off at the Boston Marathon, killing three people and wounding more than 170.

"The movie is such a love letter to Boston," Feig told CNN. "A lot of our cast are Boston people, either born or raised. So we really would like to support that city. I love that city."

"It's been an amazing tight-knit community before this happened, and it just bonded a community even more," Bullock said. "I don't think a screening would ever be enough, feel like it's enough to do for them."

"It's a remarkable place, an amazing city that's obviously going through a really tough situation," McCarthy said. "I have a sweet spot for it now."

Bullock, who is also a film producer, also starred in "Two Weeks Notice," the first major movie production shot in New York City following the Sept. 11, 2001 terror attack on the World Trade Center.